Now, let's address your question, should it be different? Sure, but not taxi vs people driving. All drivers should be targeted, not just professional drivers. This is not like airliners vs general aviation, because those two very rarely share paths and runway, while we all share the same roads. If I die as a taxi passenger because the other driver made a mistake, I'll still be dead.
Also, deaths on the road in the western world has been drastically declining because of campaign and laws against drunk driving, enforcement of speed limits, better engineering of roads and car safety. What are you proposing here for technology to increase road safety when you are saying maybe it should be different?